Leos don’t need moss hides unless to aid shedding because they aren’t tropical reptiles. Search they the cage thoroughly once more although leos can’t climb the glass walls so unless he has a high basking spot then there is a chance but just relax and stay calm because stressing yourself isn’t gonna clear your mind helping you find him but look for small dark spaces ground level like under your bed,dresser etc.... Look in your shoes,bags,closets etc.... And keep doors shut especially they one where his cage was at

Also make sure to get locking cage clips so this problem won’t be repeated..... Their like $2-3 at petland discounts and since their nocturnal during the day he maybe sleeping and hiding so it’ll be best looking during this time since he’d be in one spot but don’t get me wrong looking at night will be good to since he’d most likely pop out since they are active at night